package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnum;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartyFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.lang.reflect.Member;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @Author: Zjn ; Bring it on !!!
 * @Date: 2021/11/16 0016 16:07
 * Note:
 */
@Controller
public class LoginController {

    @Autowired
    ThirdPartyFeignService thirdPartyFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;


    //发送验证码
    @ResponseBody
    @GetMapping("/sms/sendCode")
    public R sendCode(@RequestParam("phone") String phone) {
        //TODO         //1.接口防刷，指无限刷新页面重新发送验证码

        //在发送验证码时判断是否在60s内以及发送过验证码，从redis中获取该键对应的时间
        //****若判断是否包含该键   第三方服务无法保证一定能发送验证码
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (StringUtils.hasLength(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            //System.currentTimeMillis()以毫秒为单位60s*1000
            if (System.currentTimeMillis() - l < 60000) {
                //60s内不能再发
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(), BizCodeEnum.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //生成验证码需处理两个问题
        //2.验证码作再次校验,redis ,存key-phone value-code
        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = code + "_" + System.currentTimeMillis();
        //redis缓存验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone
                , substring, 10, TimeUnit.MINUTES);

        thirdPartyFeignService.sendCode(phone, code);
        return R.ok();
    }


    /**
     * //TODO 重定向携带数据，利用session原理，将数据放在session中。
     * 取出这个数据后就会删掉
     *
     * //TODO 1.分布式下的session问题
     * RedirectAttributes：模拟重定向携带数据
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String register(@Validated UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField
                    , FieldError::getDefaultMessage));

            redirectAttributes.addFlashAttribute("errors", errors);
            //校验出错，返回到注册页

            //Request method 'POST' not supported
            //用户注册->/regist[post]----> "forward:/reg.html"(webMvcConfig路径映射默认以get方式访问)
            //*****解析：forward通过转发将post请求发送给路径映射解析器，但是路径映射解析器要求发送get请求
//            return "reg";
            return "redirect:http://auth.gulimall.com/reg.html";
            //return "forward:/reg.html";
        }
        //真正注册，调用远程服务进行注册
        //1.校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (StringUtils.hasLength(s)) {
            if (code.equals(s.split("_")[0])) {
                //删除验证码
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX+vo.getPhone());
                //验证码通过  //真正注册，调用远程服务进行注册
                R regist = memberFeignService.regist(vo);
                if(regist.getCode()==0){
                    //成功
                    return "redirect:http://auth.gulimall.com/login.html";
                }else {
                    HashMap<String, String> errors = new HashMap<>();
                    errors.put("msg",regist.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else{
                HashMap<String, String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else{
            HashMap<String, String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //注册成功回到首页
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute==null) {
            //没登陆
            return "login";
        }else{
            return "redirect:http://gulimall.com";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes
        , HttpSession session){

        //远程登录
        R login = memberFeignService.login(vo);
        if(login.getCode() == 0){
            //成功
            String data = login.getData("data", new TypeReference<String>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else{
            HashMap<String, String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }
}
